Yes. According to ASCE 24-14 (9.3): In Coastal High Hazard Areas, Coastal A Zones, and other High Risk Flood Hazard Areas, concrete slabs used as parking pads, enclosure floors, landings, decks, walkways, patios, and similar uses shall be permitted beneath or adjacent to structures, provided the concrete slabs are designed and constructed as described below:

  1. To be structurally independent of the primary foundation system of the structure, to not transfer flood loads to the main structure, and to be frangible and break away to minimize the debris capable of causing significant damage to any structure. Reinforcing of concrete slabs, including welded wire reinforcement, shall not be used to minimize the potential for concrete slabs being a source of debris. Slabs shall not have turned down edges, and maximum slab thickness shall not exceed 4 in.; or
  2. To be self-supporting structural slabs capable of remaining intact and functional under base flood conditions, including expected erosion or uplift pressures, and the main structure shall be capable of resisting any added flood loads and effects of local scour due to the presence of the slabs.